package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    private AttrAttrgroupRelationDao attrAttrgroupRelationDao;

    @Autowired
    private AttrGroupDao attrGroupDao;

    @Autowired
    private CategoryDao categoryDao;

    @Autowired
    private CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    @Transactional
    public void saveAttr(AttrVo attr) {

        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        // 保存基本数据
        this.save(attrEntity);
        // 保存关联关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode() && attr.getAttrGroupId() != null) {
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            attrAttrgroupRelationEntity.setAttrId(attrEntity.getAttrId());
            attrAttrgroupRelationEntity.setAttrGroupId(attr.getAttrGroupId());

            this.attrAttrgroupRelationDao.insert(attrAttrgroupRelationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {

        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type", "base".equalsIgnoreCase(type)
                        ? ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode()
                        : ProductConstant.AttrEnum.ATTR_ENUM_SALE.getCode());
        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);

        PageUtils pageUtils = new PageUtils(page);

        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);
            // 设置分类和分组的名字
            if ("base".equalsIgnoreCase(type)) {
                AttrAttrgroupRelationEntity attrId = this.attrAttrgroupRelationDao
                        .selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>()
                                .eq("attr_id", attrEntity.getAttrId()));

                if (attrId != null && attrId.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = this.attrGroupDao.selectById(attrId.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            CategoryEntity categoryEntity = this.categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }

            return attrRespVo;
        }).collect(Collectors.toList());
        pageUtils.setList(respVos);

        return pageUtils;
    }

    @Override
    @Cacheable(value = "attr", key = "'attrinfo:' + #root.args[0]")
    public AttrRespVo getAttrInfo(Long attrId) {

        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode()) {
            // 设置分组信息
            AttrAttrgroupRelationEntity attrgroupRelationEntity = this.attrAttrgroupRelationDao
                    .selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
            if (attrgroupRelationEntity != null) {
                attrRespVo.setAttrGroupId(attrgroupRelationEntity.getAttrGroupId());

                AttrGroupEntity attrGroupEntity = this.attrGroupDao.selectById(attrgroupRelationEntity.getAttrGroupId());
                if (attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        // 设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = this.categoryService.findCatelogPath(catelogId);
        if (catelogPath.length > 0) {
            attrRespVo.setCatelogPath(catelogPath);
        }

        CategoryEntity categoryEntity = this.categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }

        return attrRespVo;
    }

    @Override
    @Transactional
    public void updateAttr(AttrVo attr) {

        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        // 保存基本数据
        this.updateById(attrEntity);
        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode()) {
            // 保存关联关系
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            attrAttrgroupRelationEntity.setAttrId(attrEntity.getAttrId());
            attrAttrgroupRelationEntity.setAttrGroupId(attr.getAttrGroupId());
            // 判断新增操作还是更新操作
            Integer selectCount = this.attrAttrgroupRelationDao
                    .selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq("attr_id", attr.getAttrId()));
            if (selectCount > 0) {
                this.attrAttrgroupRelationDao.update(attrAttrgroupRelationEntity,
                        new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            } else {
                this.attrAttrgroupRelationDao.insert(attrAttrgroupRelationEntity);
            }
        }
    }

    /**
     * 根据分组id查找所有的关联属性(规格参数)
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {

        List<AttrAttrgroupRelationEntity> attrgroupRelationList = this.attrAttrgroupRelationDao
                .selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));

        List<Long> attrIds = attrgroupRelationList.stream().map((attr) -> {return attr.getAttrId();})
                .collect(Collectors.toList());
        if (attrIds == null || attrIds.size() == 0) {
            return null;
        }
        Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
        return (List<AttrEntity>) attrEntities;
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] attrGroupRelationVos) {

        List<AttrAttrgroupRelationEntity> collect = Arrays.asList(attrGroupRelationVos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        // 批量删除
        this.attrAttrgroupRelationDao.deleteBatchRelation(collect);
    }

    /**
     * 获取当前分组没有关联的所有属性
     * @param attrgroupId
     * @param params
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Long attrgroupId, Map<String, Object> params) {
        // 1、当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = this.attrGroupDao.selectById(attrgroupId);
        // 获取当前分类的id
        Long catelogId = attrGroupEntity.getCatelogId();
        // 2、当前分组只能关联别的分组没有引用的属性
        // 查到当前分类下的其他分组以及这些分组关联的属性
        List<AttrGroupEntity> attrGroupEntityList = this.attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>()
                .eq("catelog_id", catelogId));

        List<Long> collect = attrGroupEntityList.stream().map((item) -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        List<AttrAttrgroupRelationEntity> attrgroupRelationList = this.attrAttrgroupRelationDao
                .selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));

        List<Long> attrIds = attrgroupRelationList.stream().map((item) -> {
            return item.getAttrId();
        }).collect(Collectors.toList());
        // 从当前分类的所有属性中剔除这些属性
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("catelog_id", catelogId)
                .eq("attr_type", ProductConstant.AttrEnum.ATTR_ENUM_BASE.getCode());

        if (attrIds != null && attrIds.size() > 0) {
            queryWrapper.notIn("attr_id", attrIds);
        }

        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and((w) -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> attrEntityIPage = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);

        PageUtils pageUtils = new PageUtils(attrEntityIPage);
        return pageUtils;
    }

    @Override
    public List<Long> selectSearchAttrIds(List<Long> attrIds) {
        return baseMapper.selectSearchAttrIds(attrIds);
    }
}